Final answer:
Certain findings on an electrocardiogram (ECG) may suggest a potential cardiac concern, such as a PR interval greater than 0.20 seconds, an abnormal QRS complex duration, and an elevation of the ST segment above baseline.
Step-by-step explanation:
The electrocardiogram (ECG) is a test that records the electrical activity of the heart. Certain findings on an ECG may suggest a potential cardiac concern. One such finding is a PR interval greater than 0.20 seconds, which may indicate a delay in the passage of the electrical impulse from the atria to the ventricles. This can be seen in conditions such as atrioventricular block.
Other abnormal findings on an ECG include an abnormal QRS complex duration, which may suggest ventricular conduction abnormalities, and an elevation of the ST segment above baseline, which is often seen in patients with an acute myocardial infarction (heart attack).